A sample from the products for the Frame Cover (model K3/k4/k5/k6) include: Washer, Bolt, Cover,frame,r(white), Washer,frame C.
In this schematic the "Bolt" is used most often.
The Rm250 2006 (k6) Usa (e03) Frame Cover (model K3/k4/k5/k6) consists of thirteen pieces with the Cover,frame R being the most expensive.